<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css"
    />
    <style>
      .red {
        color: red;
      }
    </style>
  </head>

  <body>
    <div id="app">
      <div class="container">
        <!-- 顶部搜索框模块 -->
        <div class="form-group">
          <div class="input-group">
            <h4>品牌管理</h4>
          </div>
        </div>

        <!-- 数据表格 -->
        <table class="table table-bordered table-hover mt-2">
          <thead>
            <tr>
              <th>编号</th>
              <th>资产名称</th>
              <th>价格</th>
              <th>创建时间</th>
              <th>操作</th>
            </tr>
          </thead>
          <tbody v-if="list.length">
            <tr v-for="(item, index) in list" :key="item.id">
              <td>{{ item.id }}</td>
              <td>{{ item.name }}</td>
              <!-- 如果价格超过 100，就有 red 这个类 -->
              <td :class="{red: item.price > 100}">{{ item.price }}</td>
              <td>{{ item.time }}</td>
              <td><a href="#" @click.prevent="del(item.id)">删除</a></td>
            </tr>
            <tr style="background-color: #eee">
              <td>统计:</td>
              <td colspan="2">总价钱为: {{ total }}</td>
              <td colspan="2">平均价: {{ avg }}</td>
            </tr>
          </tbody>
          <tfoot v-else>
            <tr>
              <td colspan="5" style="text-align: center">暂无数据</td>
            </tr>
          </tfoot>
        </table>

        <!-- 添加资产 -->
        <form class="form-inline">
          <div class="form-group">
            <div class="input-group">
              <input
                type="text"
                class="form-control"
                placeholder="资产名称"
                v-model="name"
              />
            </div>
          </div>
          &nbsp;&nbsp;&nbsp;&nbsp;
          <div class="form-group">
            <div class="input-group">
              <input
                type="text"
                class="form-control"
                placeholder="价格"
                v-model.number="price"
              />
            </div>
          </div>
          &nbsp;&nbsp;&nbsp;&nbsp;
          <!-- 阻止表单提交 -->
          <button class="btn btn-primary" @click.prevent="addProperty">
            添加资产
          </button>
        </form>
      </div>
    </div>
    <script src="../js/vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          name: "", // 名称
          price: '', // 价格
          list: [
            { id: 100, name: "外套", price: 199, time: new Date("2010-08-12") },
            { id: 101, name: "裤子", price: 34, time: new Date("2013-09-01") },
            { id: 102, name: "鞋", price: 25.4, time: new Date("2018-11-22") },
            {
              id: 103,
              name: "头发",
              price: 19900,
              time: new Date("2020-12-12"),
            },
          ],
        },
        methods: {
          // 删除
          del(id) {
            this.list = this.list.filter((item) => item.id !== id);
          },
          // 添加
          addProperty() {
            if(this.name === '' || this.price === ''){
                alert('请输入资产名称和价格')
                return
            }
            // 创建新的资产对象
            const newItem = {
              id:~~(Math.random() * 1000000),
              name: this.name,
              price: this.price,
              time: new Date(),
            };
            // 将新资产添加到列表中
            this.list.unshift(newItem);
            // 清空输入框的值
            this.name = "";
            this.price = '';
          },
        },
        computed:{
            // 总价
            total(){
                return this.list.reduce((total,item)=>total+item.price,0)
            },
            // 平均价
            avg(){
                return (this.total/this.list.length).toFixed(1)
            }
        },
        watch: {
          list: {
            deep: true,
            handler(newList) {
              localStorage.setItem("assetList", JSON.stringify(newList));
            },
          },
        },
        created() {
          const storedList = localStorage.getItem("assetList");
          if (storedList) {
            this.list = JSON.parse(storedList);
          }
        },
      });
    </script>
  </body>
</html>
